Footnote Caption Latex

\documentclass{article}

\begin{document}

\begin{table}
\begin{minipage}{\textwidth}                                                                                         
\begin{center}
\begin{tabular}{|l|l|l|}
\hline 
TPA & Components & Cost \\
\hline
 & Total & 56558.4 \\                                                                                             
\hline 
\end{tabular}
\caption[Hardware cost estimation]{Hardware cost estimation~\footnote{per router}}
\end{center}
\end{minipage}
\end{table}

\end{document}